KR102274433B1 - Chroma compensation method and apparatus, device, display apparatus and storage medium - Google Patents

Abstract

Chroma compensation method, apparatus and device, display apparatus and storage medium. The chroma compensation method includes: obtaining an initial color of a display sub-pixel in a target pixel unit below a target luminance, and a target color of a target pixel unit below a target luminance (101) - the target pixel unit receives light of different colors comprising at least two emitting display sub-pixels; based on the target color and the initial color of each display sub-pixel, respectively obtaining (102) a complementary color gain of each display sub-pixel under the target luminance; and compensating (103) the chroma of the target pixel unit based on the complementary color gain of each display sub-pixel below the target luminance. The chroma compensation method improves the display flexibility of the display panel.

Description

Chroma compensation method and apparatus, device, display apparatus and storage medium

This application claims priority to Chinese Patent Application No. 201810345229.7, filed on April 17, 2018 and entitled "CHROMA COMPENSATION METHOD AND APPARATUS, DEVICE, DISPLAY DEVICE AND STORAGE MEDIUM", the entire content of which is hereby The specification is incorporated herein by reference.

<Technical field>

The present disclosure relates to the field of display technologies, and more particularly, to a chroma compensation method and apparatus, device, display device and storage medium.

Organic light-emitting diode (OLED), as a current-type light emitting device, is increasingly used in high-performance display devices, and in order to improve the luminous efficiency of OLED display devices, R (red) sub-pixels, G (green) A new RGBW OLED display device has emerged, consisting of sub-pixels, B (blue) sub-pixels, and W (white) sub-pixels, the color of W sub-pixels being the color of R sub-pixels, G It is determined based on the color of the sub-pixels, and the color of the B sub-pixels.

The present disclosure provides a chroma compensation method and apparatus, a device, a display device and a storage medium. The technical solution is:

In one aspect, a method for chroma compensation is provided. In this way,

obtaining an initial color of a display sub-pixel in a target pixel unit below a target luminance, and a target color of a target pixel unit below a target luminance - the target pixel unit comprises at least two display sub-pixels of different light colors Included -;

obtaining a complementary color gain of each of the display sub-pixels below the target luminance based on the target color and the initial color of each of the display sub-pixels; and

compensating for the color difference of the target pixel unit based on the complementary color gain of each of the display sub-pixels below the target luminance;

The complementary color gain of any of the display sub-pixels below the target luminance is the degree to which any of the display sub-pixels need to be compensated when the color of the target pixel unit is compensated from the initial color below the target luminance to the target color. is used to express

Optionally, obtaining a complementary color gain of each of the display sub-pixels below a target luminance based on an initial color and a target color of each of the display sub-pixels comprises:

Query the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels of any of the display sub-pixels below the target luminance based on the target color and the initial color of any of the display sub-pixels. Determining a complementary color gain - the correspondence relationship recording the complementary color gain of any of the display sub-pixels for which the target pixel unit under the initial color and different luminances is compensated with the target color.

Optionally, querying a correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels to determine which of the display sub-pixels below the target luminance based on the target color and the initial color of any of the display sub-pixels. Prior to determining the complementary color gain of any, the method further comprises:

obtaining a complementary color gain of each of the display sub-pixels in the plurality of reference luminances based on an initial color and a target color of each of the display sub-pixels; and

establishing a correspondence relationship between the luminance and the initial color of each of the display sub-pixels and the complementary color gain of each of the display sub-pixels below the target color.

Optionally, obtaining a complementary color gain of each of the display sub-pixels comprises:

determining, at the first luminance, a first initial color of the target pixel unit based on an initial color of the at least two display sub-pixels, the first luminance being the target luminance or any of a plurality of reference luminances;

obtaining, based on the first initial color and the initial color of the at least two display sub-pixels, a first replacement ratio of the initial color of each of the display sub-pixels for the first initial color, the first replacement ratio being the first 1 is the ratio of the initial color of each of the display sub-pixels in the initial color;

obtaining, based on the target color and the initial color of the at least two display sub-pixels, a second replacement ratio of the initial color of each of the display sub-pixels to the target color - the second replacement ratio is the display at the target color is the ratio of the initial color of each of the sub-pixels;

determining a first complementary color coefficient of a first initial color under the first luminance and a second complementary color coefficient of a target color under the first luminance, respectively, based on the first substitution ratio and the second substitution ratio - a first complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when acquiring the first initial color, and the second complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when acquiring the target color; and

determining a complementary color gain of each of the display sub-pixels under the first luminance based on the first complementary color coefficient and the second complementary color coefficient.

Optionally, the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; Sub-time the color of the pixels are represented by color coordinates, the first sub-claim j replacement ratio corresponding to the pixels R _Wj1, the second sub-claim j replacement ratio corresponding to the pixels R _Wj2, and the third sub- The jth replacement ratio R _{Wj3 corresponding to the pixel is}

를 충족하고,

to meet,

where j is 1 or 2, the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), the color coordinates of the initial color of the second sub-pixel are (G _X , G _Y ) and , the color coordinates of the initial color of the third sub-pixel are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), and the color coordinates of the target color are (W _2X , W ) _2Y ), R _Z =1-R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X -W _1Y , W _2Z =1-W _2X -W _2Y .

Optionally, when the colors of the sub-pixels are represented by the color coordinates, based on the first replacement ratio and the second replacement ratio, a first complementary color coefficient of the first initial color below the first luminance and the first luminance below The step of determining each of the second complementary color coefficients of the target color of

obtaining relative positions of color coordinates of a first initial color and a target color in a color coordinate system;

determining, based on the relative positions, a dominant color component that causes the first initial color to deviate from the target color, wherein the dominant color component is the color component having the largest proportion in the color component that causes the first initial color to deviate from the target color. Im-;

determining, as a first complementary color coefficient, a first replacement ratio of sub-pixels whose light color is a predominant color component; and

determining, as a second complementary color coefficient, a second replacement ratio of the sub-pixels in which the light color is a predominant color component.

Optionally, the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; Determining, based on the relative positions, a dominant color component that causes the first initial color to deviate from the target color comprises:

of the second sub-pixel as the dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _{2Y .} determining the light color;

As a dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _{2Y .} determining a light color of the third sub-pixel; and

As the dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _{2Y .} determining a light color of the first sub-pixel.

Optionally, the first complementary color coefficient R _W1 , the second complementary color coefficient R _{W2 , and the complementary color gain G i} of the i-th sub-pixel below the first luminance are:

를 충족하고,

to meet,

where R _W2i is the second replacement ratio corresponding to the i-th sub-pixel, R _W1i is the first replacement ratio corresponding to the i-th sub-pixel, and n is the bit of the driving output signal provided for the sub-pixel number, and the drive output signal is used to drive the sub-pixel to emit light.

Optionally, querying a correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels to determine which of the display sub-pixels below the target luminance based on the target color and the initial color of any of the display sub-pixels. Determining the complementary color gain of anything includes:

querying the correspondence relationship according to the target luminance;

determining a complementary color gain corresponding to the target luminance as the complementary color gain of any of the display sub-pixels below the target luminance when the target luminance is written into the correspondence relationship;

Determining a first candidate luminance and a second candidate luminance among a plurality of luminances recorded in the correspondence relationship when the target luminance is not recorded in the correspondence relationship - The first candidate luminance is weaker than the target luminance and the minimum luminance difference above the target luminance one of the plurality of luminances, wherein the second candidate luminance is one of the plurality of luminances that are stronger than the target luminance and have a minimum luminance difference above the target luminance; and

A display sub-pixel below the target luminance according to a linear interpolation method, based on the target luminance, the first candidate luminance, the second candidate luminance, a complementary color gain corresponding to the first candidate luminance, and a complementary color gain corresponding to the second candidate luminance. and determining a complementary color gain of any of them.

Optionally, compensating for the color difference of the target pixel unit based on the complementary color gain of each of the display sub-pixels below the target luminance comprises:

determining a drive output signal provided for any of the display sub-pixels based on the complementary color gain of any of the display sub-pixels below the target luminance, the drive output signal driving the sub-pixel to emit light configured to emit -; and

and providing a drive output signal to any of the display sub-pixels to compensate for the color difference of the target pixel unit.

In another aspect, a chroma compensation apparatus is provided. These devices are

a first acquiring module, configured to acquire an initial color of a display sub-pixel in a target pixel unit at a target luminance, and a target color of a target pixel unit below the target luminance, the target pixel unit, comprising: including display sub-pixels;

a second acquiring module, configured to acquire a complementary color gain of each of the display sub-pixels below the target luminance based on the target color and the initial color of each of the display sub-pixels;

a compensation module, configured to compensate for a color difference of the target pixel unit based on the complementary color gain of each of the display sub-pixels below the target luminance;

The complementary color gain of any of the display sub-pixels below the target luminance is the degree to which any of the display sub-pixels need to be compensated when the color of the target pixel unit is compensated from the initial color below the target luminance to the target color. is used to express

Optionally, the second obtaining module queries the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels to display the display below the target luminance based on the target color and the initial color of any of the display sub-pixels. configured to determine the complementary color gain of any of the sub-pixels, and this correspondence records the complementary color gain of any of the display sub-pixels for which the target pixel unit is compensated for the initial color and the target color under different luminances. do.

Optionally, the second acquiring module is further configured to acquire a complementary color gain of each of the display sub-pixels in the plurality of reference luminances based on an initial color and a target color of each of the display sub-pixels;

The apparatus further includes an establishment module for establishing a correspondence relationship between an initial color of each of the display sub-pixels and a luminance and a complementary color gain of each of the display sub-pixels below the target color.

Optionally, the second acquisition module comprises:

a first determining sub-module, configured to determine, in the first luminance, a first initial color of the target pixel unit based on an initial color of the at least two display sub-pixels - the first luminance is the target luminance or a plurality of reference luminances any of -;

a first acquiring sub-module, configured to acquire, based on the first initial color and the initial colors of the at least two display sub-pixels, a first replacement ratio of an initial color of each of the display sub-pixels for the first initial color - the first replacement ratio is the ratio of the initial color of each of the display sub-pixels in the first initial color;

a second obtaining sub-module- second replacement, configured to obtain, based on the target color and the initial color of the at least two display sub-pixels, a second replacement ratio of the initial color of each of the display sub-pixels with respect to the target color the ratio is the ratio of the initial color of each of the display sub-pixels in the target color;

a second determining sub, configured to determine, based on the first replacement ratio and the second replacement ratio, a first complementary color coefficient of the first initial color under the first luminance and a second complementary color coefficient of the target color under the first luminance, respectively -module- the first complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when acquiring the first initial color, and the second complementary color coefficient is the degree of chrominance compensation that needs to be performed when acquiring the target color used to express -;

and a third determining sub-module, configured to determine a complementary color gain of each of the display sub-pixels under the first luminance based on the first complementary color coefficient and the second complementary color coefficient.

Optionally, the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; Sub-time the color of the pixels are represented by color coordinates, the first sub-claim j replacement ratio corresponding to the pixels R _Wj1, the second sub-claim j replacement ratio corresponding to the pixels R _Wj2, and the third sub- The jth replacement ratio R _{Wj3 corresponding to the pixel is}

를 충족하고,

to meet,

where j is 1 or 2, the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), the color coordinates of the initial color of the second sub-pixel are (G _X , G _Y ) and , the color coordinates of the initial color of the third sub-pixel are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), and the color coordinates of the target color are (W _2X , W _2Y ), R _Z =1-R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X -W _1Y , W _2Z = 1-W _2X -W _2Y .

Optionally, when the colors of the sub-pixels are represented by color coordinates, the second determining sub-module is configured to:

to obtain relative positions of the color coordinates of the first initial color and the target color in a color coordinate system;

determine, based on the relative positions, the predominant color component that causes the first initial color to deviate from the target color - the dominant color component being the color component having the largest proportion in the color component that causes the first initial color to deviate from the target color -;

determine, as a first complementary color coefficient, a first replacement ratio of sub-pixels in which the light color is a predominant color component;

and determine, as a second complementary color coefficient, a second replacement ratio of the sub-pixels in which the light color is a predominant color component.

Optionally, the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; The second determining sub-module comprises:

of the second sub-pixel as the dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _{2Y .} to determine the light color;

As a dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _{2Y .} determine a light color of the third sub-pixel;

As the dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _{2Y .} and determine a light color of the first sub-pixel.

In another aspect, a display device is provided. Such a display device includes a chroma compensation device. These chroma compensation devices are

a first acquiring module, configured to acquire an initial color of a display sub-pixel in a target pixel unit at a target luminance, and a target color of a target pixel unit below the target luminance, the target pixel unit, comprising: including display sub-pixels;

a second acquiring module, configured to acquire a complementary color gain of each of the display sub-pixels below the target luminance based on the target color and the initial color of each of the display sub-pixels;

a compensation module, configured to compensate for a color difference of the target pixel unit based on the complementary color gain of each of the display sub-pixels below the target luminance;

The complementary color gain of any of the display sub-pixels below the target luminance is the degree to which any of the display sub-pixels need to be compensated when the color of the target pixel unit is compensated from the initial color below the target luminance to the target color. is used to express

In another aspect, a device for use in chroma compensation is provided. These devices are

processor; and

memory;

The memory stores at least one program configured to be executed by the processor, and when executed by the processor, may implement the chroma compensation method according to any of the above aspects.

In another aspect of the present disclosure, a storage medium storing a computer program is provided. Such a computer program, when executed by a processor, performs a chroma compensation method according to any of the above aspects.

For clearer descriptions of the technical solutions in the embodiments of the present disclosure, the following briefly introduces accompanying drawings required to explain the embodiments. Obviously, the accompanying drawings in the following description show only some embodiments of the present disclosure, and a person skilled in the art may also derive other drawings from these accompanying drawings without creative efforts.
1 is a flowchart of a chroma compensation method according to an embodiment of the present disclosure;
2 is a flowchart of another chroma compensation method according to an embodiment of the present disclosure.
3 is a flowchart of a method for obtaining a complementary color gain of each of display sub-pixels according to an embodiment of the present disclosure;
4 is a schematic diagram of color coordinates of an R sub-pixel, a G sub-pixel, a B sub-pixel, and a W sub-pixel according to an embodiment of the present disclosure;
5 is a schematic diagram of X-axis color coordinates of a W sub-pixel that varies with luminance according to an embodiment of the present disclosure;
6 is a schematic diagram of Y-axis color coordinates of a W sub-pixel that varies with luminance according to an embodiment of the present disclosure;
7 is a flowchart of a method for determining a first complementary color coefficient and a second complementary color coefficient according to an embodiment of the present disclosure;
8 is a schematic diagram of complementary color gains corresponding to a B sub-pixel under different luminances according to an embodiment of the present disclosure;
9 is a schematic diagram of complementary color gains corresponding to a G sub-pixel under different luminances according to an embodiment of the present disclosure;
10 is a schematic diagram of complementary color gains corresponding to an R sub-pixel under different luminances according to an embodiment of the present disclosure;
11 illustrates a target luminance based on an initial color and a target color of any of the display sub-pixels by querying the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels in accordance with an embodiment of the present disclosure; Below is a flow diagram of a method for determining the complementary color gain of any of the display sub-pixels.
12 is a schematic structural diagram of a chroma compensation apparatus according to an embodiment of the present disclosure.
13 is a schematic structural diagram of another chroma compensation apparatus according to an embodiment of the present disclosure.
14 is a schematic structural diagram of a second acquisition module according to an embodiment of the present disclosure;
15 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
16 is a schematic structural diagram of a timing controller according to an embodiment of the present disclosure;
17 is a schematic structural diagram of a pixel unit according to an embodiment of the present disclosure;

BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the present disclosure are described in further detail with reference to the accompanying drawings, to more clearly present the principles and advantages of the present disclosure.

In general, in the RGBW OLED display device, the color of the W sub-pixel is determined according to the color of the R sub-pixel, the color of the G sub-pixel, and the color of the G sub-pixel based on the theory of color measurement, and the display The color shown by the panel is determined according to the mixed color of the color displayed by the R sub-pixel, the color displayed by the G sub-pixel, and the color displayed by the B sub-pixel. However, in different application scenarios, different requirements exist for the final color shown by the display panel. Therefore, in order to improve the display flexibility of the display panel, the color difference compensation is performed on the pixel units in the display panel according to the requirements of different application scenarios, so that the color shown by the display panel meets the corresponding application scenario. is also required.

Embodiments of the present disclosure provide a chroma compensation method for performing chroma compensation on a pixel unit in a display panel, wherein the display panel includes a plurality of pixel units, each pixel unit having at least two of different colors display sub-pixels. As shown in FIG. 1 , this method may include:

Step 101: The initial color of the display sub-pixel in the target pixel unit below the target luminance, and the target color of the target pixel unit below the target luminance are acquired.

The target pixel unit includes at least two display sub-pixels of different light colors. The target color is a color displayed by the target pixel unit after color difference compensation is performed on the target pixel unit. Alternatively, the target color may be a color determined to be shown by the target pixel unit according to the requirements of the application scenario.

Step 102: A complementary color gain of each of the display sub-pixels below the target luminance is obtained based on the target color and the initial color of each of the display sub-pixels.

Step 103: The color difference of the target pixel unit is compensated based on the complementary color gain of each of the display sub-pixels below the target luminance.

The complementary color gain of any of the display sub-pixels below the target luminance is the degree to which any of the display sub-pixels need to be compensated when the color of the target pixel unit is compensated from the initial color below the target luminance to the target color. is used to express

In summary below the target luminance, the chroma compensation method according to embodiments of the present disclosure calculates the complementary color gain of each of the display sub-pixels below the target luminance based on the target color and the initial color of each of the display sub-pixels. A color shown by a display panel is different, comprising: acquiring, compensating for a color difference of a target pixel unit based on a complementary color gain, and compensating for a color shown by a display panel according to different application scenarios; It meets application scenarios, thereby improving the display flexibility of the display panel and enabling the display panel to be applied to various application scenarios.

below target luminance

Optionally, in the display process of the display panel, the complementary color gain of each of the display sub-pixels may be obtained in real time, and chrominance compensation is performed for the target pixel unit according to the complementary color gain. Alternatively, a correspondence relationship between the luminance and the complementary color gain of the display sub-pixel may be pre-established, and queried to obtain the complementary color gain of the display sub-pixel when the complementary color gain of the display sub-pixel needs to be obtained . A chroma compensation method according to embodiments of the present disclosure will be described below by taking as an example pre-establishment and query of a correspondence relationship to obtain a complementary color gain of a display sub-pixel. As shown in Figure 2, this method may include:

Step 201: A complementary color gain of each of the display sub-pixels in the plurality of reference luminances is obtained based on the initial color and the target color of each of the display sub-pixels.

The display panel includes a plurality of pixel units, each pixel unit including at least two display sub-pixels. In an implementable embodiment, a complementary color gain of all or a part of a plurality of pixel units may be obtained, and a corresponding relationship between the complementary color gain and the luminance is established, and the target luminance according to this correspondence in a subsequent process of use of the display panel. Obtain the complementary color gain of the display sub-pixel below, thereby achieving chroma compensation for the display panel according to this complementary color gain. For convenience of description, the pixel unit in which the display sub-pixels that need to obtain the complementary color gain are located is referred to as a reference pixel unit. For example, when this correspondence records the correspondence between display sub-pixels of different colors in all pixel units of the display panel and the complementary color gain under different luminances, in all pixel units of the display panel The complementary color gains of the display sub-pixels of n need to be obtained, then the reference pixel unit is any of all the pixel units in the display panel. And the reference pixel unit may be, or may not be, a target pixel unit requiring chrominance compensation in a subsequent chroma compensation process, which is not specifically limited in the embodiment of the present disclosure.

Optionally, referring to FIG. 3 , obtaining a complementary color gain of each of the display sub-pixels in a plurality of reference luminances based on an initial color and a target color of each of the display sub-pixels includes the following steps can do. The first luminance is any of a plurality of reference luminances.

Step 2011: A first initial color of the target pixel unit is determined below a first luminance based on the initial colors of the at least two display sub-pixels.

The initial colors of each of the display sub-pixels may be colors stored in a memory of the display device. These initial colors may be measured by the optics and stored in memory during display of the display panel. Also, since the color of the pixel unit is obtained by mixing the colors of each display sub-pixel in the pixel unit, the first initial color of the reference pixel unit is the color of each display sub-pixel based on the theory of color measurement. It may be determined according to the initial color.

Illustratively, it is assumed that at least two display sub-pixels include R sub-pixels, G sub-pixels, and B sub-pixels, and with reference to FIG. 4 , colors are represented by color coordinates. The position of the color coordinates in the color coordinate system determined according to the initial color of each display sub-pixel is shown in Fig. 4, and based on the theory of color measurement, the first initial color of the reference pixel unit is R sub - can be determined according to the initial colors of the pixel, the G sub-pixel, and the B sub-pixel, the color coordinate position corresponding to the first initial color is shown by W in FIG. 4 , and from FIG. 4 of the reference pixel unit It can be seen that the position of the color coordinates is located inside the triangle surrounded by the R sub-pixel, the G sub-pixel, and the B sub-pixel.

Additionally, luminance can affect color coordinates, and if the luminance changes and other components of the color do not change, the color coordinates change accordingly. Illustratively, FIGS. 5 and 6 are schematic diagrams of X-axis color coordinates and Y-axis color coordinates of a pixel unit that vary with luminance, and from FIGS. 5 and 6 , under different luminances, the color coordinates of a pixel unit It can be seen that the situations of the x-axis color coordinates and the y-axis color coordinates that are different and vary according to luminance are different. Therefore, it is necessary to determine the complementary color gain of each display sub-pixel according to different luminances.

Step 2012: a first replacement ratio of an initial color of each of the display sub-pixels to a first initial color is obtained based on the initial colors and the first initial colors of the at least two display sub-pixels.

The first replacement ratio is the ratio of the initial color of each display sub-pixel in the first initial color.

Optionally, the at least two display sub-pixels in the reference pixel unit may include a first sub-pixel, a second sub-pixel, and a third sub-pixel, eg, the first sub-pixel is may be B sub-pixels, the second sub-pixel may be a G sub-pixel, and the third sub-pixel may be an R sub-pixel. When a color of a sub-pixel is represented by color coordinates, a first replacement ratio R _W1B corresponding to the first sub-pixel, a first replacement ratio R _W1G corresponding to the second sub-pixel, and a third sub-pixel The first replacement ratio R _{W1R corresponding to the pixel is}

를 충족한다.

meet the

wherein the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), the color coordinates of the initial color of the second sub-pixel are (G _X , G _Y ), and the initial color of the third sub-pixel is (G X , G Y ) The color coordinates of the color are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), the color coordinates of the target color are (W _2X , W _2Y ), and R _Z =1 -R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X -W _1Y .

Step 2013: A second replacement ratio of the initial color of each of the display sub-pixels to the target color is obtained based on the target color and the initial colors of the at least two display sub-pixels.

The second replacement ratio is the ratio of the initial color of each display sub-pixel in the target color, and the target color is the color difference compensation for the reference pixel unit when the color of each display sub-pixel is its initial color. This is the color to be drawn by the reference pixel unit later. For example, the target color may be the color that ultimately needs to be depicted by the reference pixel unit as required by the application scenario when the color of each display sub-pixel is its initial color. Exemplarily, when the colors of the display sub-pixels in each pixel unit of the display panel are their initial colors, the display panel should show standard white in a conventional display, but the target color shown by the display panel is It should be reddish white according to the requirements of the application scenario. Also, the implementation process of step 2013 may correspondingly refer to step 2012, and details are not described herein again.

Step 2014: A first complementary color coefficient of a first initial color under the first luminance and a second complementary color coefficient of a target color under the first luminance are respectively determined based on the first substitution ratio and the second substitution ratio.

The first complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when acquiring the first initial color, and the second complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when acquiring the target color. used In a conventional display process of an RGBW OLED display device, the signals provided for each pixel unit to drive it to display are: R signal, G signal, B signal, and After being converted to a W signal, it is supplied to the corresponding sub-pixels. Accordingly, the first complementary color coefficient is determined according to which the initial signal needs to be compensated when the conversion is performed according to the initial signal in the conversion process of the conventional display to obtain a signal for causing the pixel unit to show the first initial color. can be considered as an extent. The second complementary color coefficient is regarded as the degree to which the initial signal needs to be compensated when conversion is performed according to the initial signal in the conversion process based on the conventional display to obtain a signal for causing the pixel unit to show the target color. can be

Optionally, the first complementary color coefficient and the second complementary color coefficient may be determined according to relative positions of color coordinates of the first initial color and the target color. For example, when the color of a sub-pixel is represented by color coordinates, as shown in FIG. 7 , its implementation may include:

Step 2014a1: The relative positions of the color coordinates of the target color and the first initial color in the color coordinate system are obtained.

The color coordinate system may be a color coordinate system established according to the chromaticity standard CIE1931 made by the International Commission on Lighting. After the position of the color coordinates of the first initial color in the color coordinate system and the position of the color coordinates of the target color in the color coordinate system are determined, their relative positions may be determined. These relative positions are of at least three types: first type: W _{1Y >} W _2Y , second type: W _{1X >} W _2X and W _1Y < W _2Y , and third type: W _1X < W _2X and W It can be expressed as _1Y < W _{2Y , where (W 1X} , W _1Y ) are the color coordinates of the first initial color, and _{(W 2X , W 2Y} ) are the color coordinates of the target color.

Step 2014a2: A dominant color component that causes the first initial color to deviate from the target color is determined based on the relative positions.

This dominant color component is the color component that has the largest proportion in the color component that causes the first initial color to deviate from the target color; For example, the predominant color component may be red when the first initial color is more likely to be red for the target color. Alternatively, as shown in FIG. 4 , when the first initial color more tends to be both blue and red for the target color, the degree to which it tends to be blue is greater than the degree to which it tends to be red, and the dominant color component may be blue.

Exemplarily, each pixel unit may include a first sub-pixel, a second sub-pixel, and a third sub-pixel. When the color of the sub-pixel is represented by color coordinates, the implementation of the implementation process for determining, based on the relative positions, the dominant color component causing the first initial color to deviate from the target color is: determining the light color of the second sub-pixel as the dominant color component when the color coordinates (W _1X , W _1Y ) and the color coordinates (W _2X , W _2Y ) _{of the target color satisfy W 1Y} ≥ W _2Y step; As a dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _{2Y .} determining a light color of the third sub-pixel; As the dominant color component when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _{2Y .} determining a light color of the first sub-pixel.

Step 2014a3: a first replacement ratio of sub-pixels whose light color is a predominant color component is determined as a first complementary color coefficient; A second replacement ratio of the sub-pixels in which the light color is the predominant color component is determined as the second complementary color coefficient.

After the dominant color component that causes the first initial color to deviate from the target color is determined, during the conversion process, when the conversion is performed according to the initial signal to obtain a signal that causes the pixel unit to show the first initial color, the dominant color color difference compensation may be performed on the initial signal according to the first replacement ratio corresponding to the component; When the conversion is performed according to the initial signal during the conversion process to obtain a signal that causes the pixel unit to show the target color, color difference compensation may be performed on the initial signal according to the second replacement ratio corresponding to the dominant color component. . Accordingly, a first replacement ratio of sub-pixels whose light color is a predominant color component may be determined as a first complementary color coefficient, and a second replacement ratio of sub-pixels whose light color is a dominant color component may be determined as a second complementary color coefficient. have.

That is, when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _2Y , the second sub-pixel A first replacement ratio R _W12 corresponding to R W12 may be determined as the first complementary color coefficient R _W1 , and a second replacement ratio R _W22 corresponding to the second sub-pixel may be determined as the second complementary color coefficient R _W2 , that is, R _W1 = R _W12 and R _W2 = R _W22 .

When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _2Y , the second _{A first replacement ratio R W13} corresponding to the three sub-pixels may be determined as the first complementary color coefficient R _W1 , and a second replacement ratio R _W23 corresponding to the third sub-pixel may be determined as the second complementary color coefficient R _{W2 .} , that is, R _W1 = R _W13 and R _W2 = R _W23 .

When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _2Y , the second _{A first replacement ratio R W11} corresponding to one sub-pixel may be determined as a first complementary color coefficient R _W1 , and a second replacement ratio R _W21 corresponding to the first sub-pixel may be determined as a second complementary color coefficient R _{W2 .} , that is, R _W1 = R _W11 , and R _W2 = R _W21 .

Step 2015: A complementary color gain of each display sub-pixel under the first luminance is determined based on the first complementary color coefficient and the second complementary color coefficient.

Optionally, the first complementary color coefficient R _W1 , the second complementary color coefficient R _{W2 , and the complementary color gain G i} of the i-th sub-pixel below the first luminance are:

를 충족한다.

meet the

where R _W2i is the second replacement ratio corresponding to the i-th sub-pixel, R _W1i is the first replacement ratio corresponding to the i-th sub-pixel, and n is the bit of the driving output signal provided for the sub-pixel number, and the drive output signal is used to drive the sub-pixel to emit light.

For example, assuming that the driving output signals supplied to each of the display sub-pixels are all 8-bit signals, n=8, and the luminance of each of the display sub-pixels is at a gray value between [0, 255]. can be expressed by Correspondingly, the complementary color gain G ₁ corresponding to the first sub-pixel, the complementary color gain G ₂ corresponding to the second sub-pixel, and the complementary color gain G ₃ corresponding to the third sub-pixel are respectively expressed as follows:

.

.

Step 202: A correspondence between the initial color of each display sub-pixel and the luminance and the complementary color gain of each display sub-pixel below the target color is established.

After step 201 is performed for all reference pixel units in the display panel, the complementary color gain of each display sub-pixel under different reference luminances is obtained under the initial color and target color of each display sub-pixel Based on this, a one-to-one correspondence is performed for the display sub-pixels, the complementary color gain, and the luminance, and then the correspondence to record the complementary color gain and the luminance of each display sub-pixel is can be obtained. Alternatively, such correspondence may be expressed in various forms, eg, such correspondence may be expressed by a table or a curve, and a curve corresponding to any of the display sub-pixels may be represented by a different reference. can be obtained by curve fitting according to the complementary color gain of any of the display sub-pixels below the luminances. For example, a plurality of reference luminances may be selected within a range of luminance that a display sub-pixel can display, and complementary color gains corresponding to display sub-pixels in each reference luminance are respectively obtained, each A plurality of features by a quadratic curve fitting method to obtain a curve expressing the correspondence relationship between the complementary color gain and the luminance of a display sub-pixel based on the point at which the reference luminance of and the corresponding complementary color gain constitute the feature point A curve fit is performed on the points.

Exemplarily, assuming that the first sub-pixel is a B sub-pixel, the second sub-pixel is a G sub-pixel, and the third sub-pixel is an R pixel, the correspondence between the complementary color gain and the luminance is a curve Reference may be made to FIG. 8 for the complementary color gain corresponding to the B sub-pixel under different luminances, expressed by . The curve in Fig. 8 expresses the correspondence between the compensation gain and the luminance when the reference pixel unit in which the B sub-pixel is located is compensated with the target color based on the initial color of the B sub-pixel. For a complementary color gain corresponding to G sub-pixels under different luminances, reference may be made to FIG. 9 . The curve in Fig. 9 expresses the correspondence between the compensation gain and the luminance when the reference pixel unit in which the G sub-pixel is located is compensated with the target color based on the initial color of the G sub-pixel. For the complementary color gain corresponding to the R sub-pixel under different luminances, reference may be made to FIG. 10 . The curve of Fig. 10 is used to express the correspondence between the compensation gain and the luminance when the reference pixel unit in which the R sub-pixel is located is compensated with the target color based on the initial color of the R sub-pixel. Also, according to FIGS. 8 to 10 , it can be seen that the corresponding relationships between the complementary color gain under different luminances and the different sub-pixels reveal different changing trends.

Step 203: The initial color of the display sub-pixel in the target pixel unit below the target luminance, and the target color of the target pixel unit below the target luminance are acquired.

The target pixel unit and the reference pixel unit may be pixel units in the same display panel. Since pixel units in the same display panel have substantially the same display characteristics, when chrominance compensation is performed on a target pixel unit according to the correspondence obtained by the reference pixel unit, the accuracy of such compensation can be ensured.

The target color of the target pixel unit may be determined below the indication of the application requirement when the colors of at least two display sub-pixels in the target pixel unit are their initial colors, and When the colors are their initial colors, the target color of the target pixel unit may be a color specified based on the indication of the application requirement. The initial color of the display sub-pixel may be determined according to the screen that needs to be displayed. And both the initial color of the display sub-pixel and the target color of the target pixel unit corresponding thereto may be stored in the memory of the display device. In the display process, an initial color and a target color may be obtained by reading data stored in a memory.

Step 204: A complementary color gain of each of the display sub-pixels below the target luminance is obtained based on the target color and the initial color of each of the display sub-pixels.

Optionally, a correspondence between the luminance and the complementary color gain of any of the display sub-pixels is an initial value of any of the display sub-pixels to determine a complementary color gain of any of the display sub-pixels below the target luminance. It can be queried based on color and target color. This correspondence records the complementary color gain of any of the display sub-pixels for which the target pixel unit is compensated for the initial color and the target color under different luminances. Illustratively, referring to FIG. 11 , the implementation process may include:

Step 2041: A correspondence is queried according to the target luminance.

Such correspondence may record complementary color gains corresponding to display sub-pixels at multiple reference luminances, ie, such correspondence may not record complementary color gains of display sub-pixels under all luminances. have. Therefore, when the complementary color gain corresponding to the display sub-pixel below the target luminance is obtained, this correspondence is first queried according to the target luminance to determine whether the target luminance is recorded in the correspondence, and the target luminance is recorded in the correspondence. , step 2042 is performed; When the target luminance is not recorded in the correspondence relationship, step 2043 is performed.

Step 2042: A complementary color gain corresponding to the target luminance is determined as the complementary color gain of any of the display sub-pixels below the target luminance when the target luminance is written into the correspondence relationship.

When a target luminance is written into a correspondence, this correspondence can be queried according to the target luminance, and the complementary color gain corresponding to a display sub-pixel below the target luminance is the value of any of the display sub-pixels below the target luminance. It is determined as a complementary color gain (for convenience of description, hereinafter referred to as a target complementary color gain).

Illustratively, the target luminance is 100 nits, and the plurality of reference luminances are respectively LW1=25 nits, LW2=50 nits, LW3=75 nits, LW4=100 nits, LW5=125 nits, LW6=150 nits, LW7=175 a target complementary color corresponding to a target luminance, assuming that the corresponding relationships shown in FIGS. 8-10 record a complementary color gain corresponding to each of the display sub-pixels in the target pixel unit under a plurality of reference luminances. It can be seen that the gain is recorded in the correspondence relationship; By querying the correspondence relationships shown in Figs. 8 to 10 respectively in accordance with the target luminance, the complementary color gain corresponding to the B sub-pixel under the target luminance is 86, and the complementary color corresponding to the G sub-pixel under the target luminance. The gain is 0, the complementary color gain corresponding to the R sub-pixel below the target luminance is 41, then 86 can be determined as the target complementary color gain of the B sub-pixel below the target luminance, where 0 is the G below the target luminance may be determined as the target complementary color gain of the sub-pixel, and it may be obtained that 41 is determined as the target complementary color gain of the R sub-pixel below the target luminance.

Step 2043: When the target luminance is not recorded in the correspondence relationship, a first candidate luminance and a second candidate luminance are determined from among a plurality of luminances recorded in the correspondence relationship - the first candidate luminance is weaker than the target luminance and the minimum luminance above the target luminance one of the plurality of luminances having a difference, wherein the second candidate luminance is stronger than the target luminance and the minimum luminance difference above the target luminance is one of the plurality of luminances.

In an embodiment of the present disclosure, a plurality of reference luminances excluding the minimum luminance and the maximum luminance may be used as dividing points, and a luminance range taking the minimum luminance and the maximum luminance as end points may be divided into a plurality of luminance intervals. . At this time, when the target luminance is not recorded in the correspondence relationship, the target luminance interval in which the target luminance is located can be determined first, and then the complementary color gain corresponding to the target luminance is two reference luminances at the endpoints of the target luminance interval. may be determined according to the complementary color gains corresponding to , that is, step 2064 is performed, and the two reference luminances at the endpoints of the target luminance interval are the first candidate luminance and the second candidate luminance, respectively.

Illustratively, assuming that the plurality of reference luminances are LW1=25 nits, LW2=50 nits, LW3=75 nits, LW4=100 nits, LW5=125 nits, LW6=150 nits, LW7=175 nits, as splitting points Take LW2, LW3, LW4, LW5 and LW6, the luminance range [25 nits, 175 nits] is [25 nits, 50 nits], [50 nits, 75 nits], [75 nits, 100 nits], [100 nits] , 125 nits], [125 nits, 150 nits] and [150 nits, 175 nits]; When the target luminance is 40 nits, it may be determined that the target luminance interval at which the target luminance is located is [25 nits, 50 nits], then 25 nits may be determined as the first candidate luminance, and 50 nits is the second candidate It can be determined as luminance.

Step 2044: based on the target luminance, the first candidate luminance, the second candidate luminance, a complementary color gain corresponding to the first candidate luminance, and a complementary color gain corresponding to the second candidate luminance, display below the target luminance according to a linear interpolation method The complementary color gain of any of the sub-pixels is determined.

After the first candidate luminance and the second candidate luminance are determined, according to the first candidate luminance and the second candidate luminance, a target complementary color gain corresponding to any of the display sub-pixels below the target luminance is determined based on the linear interpolation method. is determined by

In an implementation, the target luminance is L1, the first candidate luminance is L2, the second candidate luminance is L3, the complementary color gain corresponding to the display sub-pixel i _{below the first candidate luminance is G i1} , and the second candidate luminance is L3 . It is assumed that the complementary color gain corresponding to the display sub-pixel i _{below is G i2} , and the target complementary color gain G _iL1 corresponding to the display sub-pixel i below the target luminance is to be determined according to a linear interpolation formula, expressed as can:

.

.

Exemplarily, assuming the target luminance is 40 nits, according to the correspondences shown in FIGS. 8-10 , the first candidate luminance is 25 nits, the second candidate luminance is 50 nits, and below the first candidate luminance Complementary color gains corresponding to the first sub-pixel, the second sub-pixel, and the third sub-pixel of are 95, 0, and 55, respectively, and the first sub-pixel, the second sub-pixel below the second candidate luminance Complementary color gains corresponding to the pixel and the third sub-pixel may be determined to be 91, 0, and 47, respectively, and based on the linear interpolation formula, the first sub-pixel, the second sub-pixel, and the first sub-pixel below the target luminance, and Target complementary color gains corresponding to the third sub-pixel may be determined to be 92.6, 0, and 50.2, respectively.

In the display process of the display panel, the implementation process of calculating the complementary color gain of each display sub-pixel under the target luminance in real time may refer to steps 2011 to step 2015 correspondingly, wherein the first in steps 2011 to 2015 It should be noted that the 1 luminance is the target luminance. Correspondingly, since there is no need to use the correspondence relationship between the complementary color gain and the luminance in the process of calculating the complementary color gain in real time, the above steps 201 to 202 may be chosen not to be performed.

Step 205: a drive output signal provided for any of the display sub-pixels is determined based on a complementary color gain of any of the display sub-pixels below the target luminance; A drive output signal is provided for any of the display sub-pixels to compensate for a chrominance difference of a target pixel unit based on the drive output signal

Since the color of each display sub-pixel is obtained by adding a filter to the white light emitting sub-pixel, after the target complementary color gain of the display sub-pixel is determined, the white light emitting sub-pixel in the display sub-pixel according to the target complementary color gain - the luminance of the pixel can be changed, so that the color of the display sub-pixel is changed, thereby changing the light color of the target pixel unit, to achieve chrominance compensation for the target pixel unit. That is, the target output luminance of any display sub-pixel may be determined according to the target complementary color gain, and according to the target output luminance of any display sub-pixel, it is required to drive any display sub-pixel to the target output luminance. A data signal is determined, which data signal is sent to a source driver to generate a corresponding drive output signal according to the data signal, this drive output signal is provided for any display sub-pixel and a corresponding drive output signal is provided for display. used to fill the corresponding sub-pixel to drive the sub-pixel, thereby implementing chrominance compensation for the target pixel unit.

Alternatively, according to the target complementary color gain, determining the target output luminance of any of the display sub-pixels comprises determining a luminance gain based on the target complementary color gain, the luminance gain of any of the display sub-pixels and updating the sum of the original luminance as the corresponding target output luminance, and keeping the luminance of the white sub-pixel in the target pixel unit unchanged - the target luminance that can be displayed by the target pixel unit and based on the maximum gray value, the luminance gain of any display sub-pixel may be determined. For example, the luminance gain M, the target luminance L, the target complementary color gain G, and the maximum gray value Q satisfy M = (G/Q) x L.

In summary, a chroma compensation method according to an embodiment of the present disclosure includes: obtaining a complementary color gain of each of the display sub-pixels under a target luminance based on an initial color and a target color of each of the display sub-pixels; A color shown by a display panel meets different application scenarios, comprising compensating for a color difference of a target pixel unit based on a complementary color gain, and compensating for a color shown by a display panel according to different application scenarios and, in doing so, improve the display flexibility of the display panel and enable the display panel to be applied to various application scenarios under the target luminance.

An embodiment of the present disclosure provides a chroma compensation apparatus 700 . As shown in FIG. 12 , this device 700 includes:

a first acquiring module 701, configured to acquire an initial color of a display sub-pixel in the target pixel unit below the target luminance, and a target color of the target pixel unit below the target luminance - the target pixel unit includes: comprising at least two display sub-pixels;

a second acquiring module 702, configured to acquire a complementary color gain of each of the display sub-pixels below the target luminance based on the target color and the initial color of each of the display sub-pixels; and

a compensation module 703, configured to compensate a chrominance difference of the target pixel unit based on the complementary color gain of each of the display sub-pixels below the target luminance;

The complementary color gain of any of the display sub-pixels below the target luminance is the degree to which any of the display sub-pixels need to be compensated when the color of the target pixel unit is compensated from the initial color below the target luminance to the target color. is used to express

In summary, a chroma compensation apparatus according to an embodiment of the present disclosure includes a second device configured to obtain a complementary color gain of each of the display sub-pixels below a target luminance based on an initial color and a target color of each of the display sub-pixels. 2 acquisition modules; and a compensation module configured to compensate a color difference of the target pixel unit based on the complementary color gain, and to compensate a color shown by the display panel according to different application scenarios, wherein the color shown by the display panel is different to meet the scenarios, thereby improving the display flexibility of the display panel and enabling the display panel to be applied to various application scenarios.

Optionally, the second obtaining module 702 queries the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels to determine the target luminance based on the initial color and the target color of any of the display sub-pixels. and determine the complementary color gain of any of the display sub-pixels below, such correspondence that the target pixel unit is compensated from the initial color and the initial color below different luminances to the target color. Record the complementary color gain of that of .

Optionally, the second acquiring module 702 is further configured to acquire a complementary color gain of each of the display sub-pixels in the plurality of reference luminances based on the target color and the initial color of each of the display sub-pixels.

Correspondingly, as shown in FIG. 13 , this apparatus 700 is configured to establish a correspondence relationship between the luminance and the complementary color gain of each of the display sub-pixels below the target color and the initial color of each of the display sub-pixels. It may further include a configured establishment module 704 .

Optionally, as shown in FIG. 14 , the second acquisition module 702 includes:

a first determining sub-module 7021, configured to determine, in the first luminance, a first initial color of the target pixel unit based on an initial color of the at least two display sub-pixels - the first luminance is the target luminance or the plurality of any of the reference luminances;

a first acquiring sub-module, configured to acquire, based on the first initial color and the initial colors of the at least two display sub-pixels, a first replacement ratio of an initial color of each of the display sub-pixels for the first initial color (7022) - the first replacement ratio is a ratio of the initial color of each of the display sub-pixels in the first initial color;

a second acquiring sub-module 7023, configured to acquire, based on the target color and the initial color of the at least two display sub-pixels, a second replacement ratio of the initial color of each of the display sub-pixels to the target color; the second replacement ratio is the ratio of the initial color of each of the display sub-pixels in the target color;

a second determining sub, configured to determine, based on the first replacement ratio and the second replacement ratio, a first complementary color coefficient of the first initial color under the first luminance and a second complementary color coefficient of the target color under the first luminance, respectively -module 7024- the first complementary color coefficient is used to express the degree of chrominance compensation that needs to be performed when obtaining the first initial color, and the second complementary color coefficient is the color difference that needs to be performed when obtaining the target color. Used to express the degree of reward -;

and a third determining sub-module 7025, configured to determine a complementary color gain of each of the display sub-pixels under the first luminance based on the first complementary color coefficient and the second complementary color coefficient.

Optionally, the at least two display sub-pixels may include a first sub-pixel, a second sub-pixel, and a third sub-pixel; Sub-time the color of the pixels are represented by color coordinates, the first sub-claim j replacement ratio corresponding to the pixels R _Wj1, the second sub-claim j replacement ratio corresponding to the pixels R _Wj2, and the third sub- The jth replacement ratio R _{Wj3 corresponding to the pixel is}

를 충족한다.

meet the

where j is 1 or 2, the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), the color coordinates of the initial color of the second sub-pixel are (G _X , G _Y ) and , the color coordinates of the initial color of the third sub-pixel are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), and the color coordinates of the first target color are (W _{2X )} , W _2Y ), and R _Z =1-R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X -W _1Y , W _2Z =1-W _2X -W _2Y .

Optionally, when the colors of the sub-pixels are represented by color coordinates, the second determining sub-module 7024 is configured to:

to obtain relative positions of the color coordinates of the first initial color and the target color in a color coordinate system;

determine, based on the relative positions, the predominant color component that causes the first initial color to deviate from the target color - the dominant color component being the color component having the largest proportion in the color component that causes the first initial color to deviate from the target color -;

determine, as a first complementary color coefficient, a first replacement ratio of sub-pixels in which the light color is a predominant color component; And

and determine, as a second complementary color coefficient, a second replacement ratio of the sub-pixels in which the light color is a predominant color component.

Optionally, the at least two display sub-pixels may include a first sub-pixel, a second sub-pixel, and a third sub-pixel; The second determining sub-module 7024 includes:

When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _2Y , the second sub- to determine the light color of the pixel;

The dominant color when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _{2Y .} determine a light color of the third sub-pixel as a component; And

The dominant color when the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the first target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _{2Y .} and determine the light color of the first sub-pixel as a component.

Optionally, the first complementary color coefficient R _W1 , the second complementary color coefficient R _{W2 , and the complementary color gain G i} of the i-th sub-pixel below the first luminance are:

를 충족한다.

meet the

where R _W2i is the second replacement ratio corresponding to the i-th sub-pixel, R _W1i is the first replacement ratio corresponding to the i-th sub-pixel, and n is the bit of the driving output signal provided for the sub-pixel number, and the drive output signal is used to drive the sub-pixel to emit light.

Optionally, the second acquisition module 702 includes:

to query the correspondence relationship according to the target luminance;

determine a complementary color gain corresponding to the target luminance as a complementary color gain when the target luminance is recorded in the correspondence relationship;

to determine a first candidate luminance and a second candidate luminance from among a plurality of luminances recorded in the correspondence relationship when the target luminance is not recorded in the correspondence relationship - the first candidate luminance is weaker than the target luminance and the minimum luminance difference above the target luminance one of the plurality of luminances, wherein the second candidate luminance is one of the plurality of luminances that are stronger than the target luminance and have a minimum luminance difference above the target luminance; And

and determine the complementary color gain according to the linear interpolation method based on the target luminance, the first candidate luminance, the second candidate luminance, a complementary color gain corresponding to the first candidate luminance, and a complementary color gain corresponding to the second candidate luminance.

Optionally, the compensation module 703 comprises:

The drive output signal drives the sub-pixel to emit light to determine a drive output signal provided for any of the display sub-pixels based on the complementary color gain of any of the display sub-pixels below the target luminance. configured to -; And

and provide a drive output signal to any of the display sub-pixels to compensate for a chrominance difference of the target pixel unit.

In summary, a chroma compensation apparatus according to an embodiment of the present disclosure includes a second device configured to obtain a complementary color gain of each of the display sub-pixels below a target luminance based on an initial color and a target color of each of the display sub-pixels. 2 acquisition modules; an application scenario in which the color displayed by the display panel is different, comprising a compensation module, configured to compensate for the color difference of the target pixel unit based on the complementary color gain, and to compensate the color displayed by the display panel according to different application scenarios; , thereby improving the display flexibility of the display panel and enabling the display panel to be applied to various application scenarios.

An embodiment of the present disclosure provides a display device. Such a display device includes a chroma compensation apparatus and a display panel according to an embodiment of the present disclosure. Such a display device may be any product or component having a display function, such as a liquid crystal panel, electronic paper, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator, and the like. Illustratively, such a display device may be an OLED display device.

Optionally, referring to FIG. 15 , the display device may further include a timing controller, a source driver, a gate driver, a data memory, and the like. The chroma compensation device according to an embodiment of the present disclosure may be disposed in a timing controller, the gate driver and the display panel are connected by a gate line (GL), and the source driver and the display panel are connected by a data line (DL). and the display panel is also loaded with a power signal EL (eg, an anode signal and a cathode signal).

The timing controller reads first color data (eg, color coordinates or initial colors of each display sub-pixels) stored in the data memory, and a second of each display sub-pixels input externally and to receive color data and to receive a timing control signal. For example, the second color data may be data of colors that need to be displayed by the R sub-pixel, the G sub-pixel, and the B sub-pixel in the application scenario, or the second color data is the second color data in the application scenario It may be data of the target color that needs to be displayed by the target pixel unit. After performing calculation, conversion and compensation for each of the signals and data, the timing controller generates a data signal, a source control signal (SCS), and a gate control signal (GCS), and converts the date signal and the SCS to the source driver. and GCS to the gate driver.

Referring to FIG. 16 , the timing controller includes a timing conversion unit, a luminance conversion unit, an algorithm compensation unit, a chroma compensation unit, and a data conversion unit. The chroma compensation unit is provided with a chroma compensation apparatus according to an embodiment of the present disclosure, and the timing conversion unit is configured to receive a timing control signal and to generate an SCS and a GCS; The luminance conversion unit receives externally input second color data of respective display sub-pixels, and converts this data into luminance signals of respective display sub-pixels and sends these luminance signals to the algorithm compensation unit is configured to; Upon receiving the luminance signals transmitted by the luminance conversion unit, the algorithm compensation unit performs the luminance signal according to compensation algorithms such as RGB-RGBW algorithm, peak luminance algorithm, driving TFT characteristic value compensation, OLED characteristic value compensation and optical compensation. compensating the chroma, and sending the compensated luminance signals to the chroma compensation unit; The chroma compensation unit performs chrominance compensation on color coordinates of different pixel units, different colors, and different luminances according to the chroma compensation method according to an embodiment of the present disclosure to generate a chroma-compensated luminance signal and to the data conversion unit; The data conversion unit may convert the luminance signal into a grayscale data signal (eg, a data signal) and send it to the source driver, so that the source driver generates a corresponding driving output signal according to the grayscale data signal, and displays The sub-pixel provides a drive output signal to drive the pixel unit for display.

The data memory includes: color coordinate data of different pixels, different colors, and different luminances of the display panel; characteristic values of different driving TFTs (thin film transistors) (eg characteristic values such as mobility K of TFT and threshold voltage Vth); characteristic values of different OLED devices (eg threshold voltage Voled of OLED); and different TFT characteristic values and optical compensation characteristic values of different OLED devices.

the source driver is configured to receive the SCS and data signals output by the timing controller, generate a source driving voltage based thereon, and transmit the source driving voltage to the display panel through the data line DL; The gate driver is configured to receive the GCS and generate a gate drive signal according to the GCS, and to transmit the gate drive signal to the display panel through the at least one gate line GL.

The display panel includes a plurality of pixel units and a power supply (eg, an anode power supply ELVDD and a cathode power supply ELVSS) that drives the OLED to emit light. Referring to FIG. 17 , each pixel unit includes at least one data line DL, at least one gate line GL, an OLED device, a storage capacitor Cst, a switch TFT T1), a driving TFT T2, an anode power supply ELVDD, and a cathode power supply ELVSS. includes

An embodiment of the present disclosure provides a device for use in chroma compensation. Such devices include a processor and memory. Such memory stores at least one program configured to be executed by the processor. Such a program, when executed by a processor, may cause the processor to perform a chroma compensation method according to embodiments of the present disclosure.

Embodiments of the present disclosure provide a storage medium, which may be a non-volatile storage medium for storing a computer program. Such a computer program, when executed by a processor, may cause the processor to perform a chroma compensation method according to embodiments of the present disclosure.

Naturally, as used herein, the term “plurality” refers to two or more. The word "and/or" in this specification describes a corresponding relationship of corresponding objects representing three kinds of relationships. For example, A and/or B can be expressed as: A is alone, A and B are simultaneously, B is alone. The character "/" generally indicates that the context object is in an "or" relationship.

What has been described above are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, or improvements within the spirit and principles of the present disclosure fall within the protection scope of the present disclosure.

Claims (20)

A chroma compensation method comprising:
obtaining an initial color of a display sub-pixel in a target pixel unit under a target luminance, and a target color of the target pixel unit under the target luminance, wherein the target pixel unit comprises at least two display sub-pixels of different light colors. Included -;
obtaining a complementary color gain of each of the display sub-pixels under the target luminance based on an initial color and a target color of each of the display sub-pixels; and
compensating for a color difference of the target pixel unit based on a complementary color gain of each of the display sub-pixels under the target luminance;
The complementary color gain of any of the display sub-pixels under the target luminance is such that when the color of the target pixel unit is compensated from the initial color to the target color under the target luminance, the display sub-pixels A chroma compensation method used to represent the degree to which any display sub-pixel needs to be compensated for. The method of claim 1 , wherein obtaining a complementary color gain of each of the display sub-pixels under the target luminance based on an initial color and a target color of each of the display sub-pixels comprises:
Query the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels to determine the target luminance based on the target color and the initial color of any of the display sub-pixels. determining a complementary color gain of any of the display sub-pixels under A chroma compensation method for recording the complementary color gain of any of the display sub-pixels. 3. The initial color and target color of any of the display sub-pixels according to claim 2, by querying the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels. Prior to determining the complementary color gain of any of the display sub-pixels under the target luminance based on
obtaining a complementary color gain of each of the display sub-pixels at a plurality of reference luminances based on an initial color and a target color of each of the display sub-pixels; and
and establishing a correspondence relationship between the luminance and the complementary color gain of each of the display sub-pixels under the target color and the initial color of each of the display sub-pixels. 4. The method of claim 3, wherein obtaining a complementary color gain of each of the display sub-pixels comprises:
determining, at a first luminance, a first initial color of the target pixel unit based on an initial color of the at least two display sub-pixels, the first luminance being the target luminance or any of the plurality of reference luminances of -;
obtaining, based on the first initial color and the initial color of the at least two display sub-pixels, a first replacement ratio of an initial color of each of the display sub-pixels to the first initial color; 1 replacement ratio is the ratio of the initial color of each of the display sub-pixels to the first initial color;
obtaining, based on the target color and the initial color of the at least two display sub-pixels, a second replacement ratio of the initial color of each of the display sub-pixels to the target color, wherein the second replacement ratio is the ratio of the initial color of each of the display sub-pixels to the target color;
determining a first complementary color coefficient of the first initial color under the first luminance and a second complementary color coefficient of the target color under the first luminance, respectively, based on the first substitution ratio and the second substitution ratio; The first complementary color coefficient is used to express the degree of color difference compensation that needs to be performed when acquiring the first initial color, and the second complementary color coefficient is the amount of color difference compensation that needs to be performed when acquiring the target color. Used to express degree -; and
and determining a complementary color gain of each of the display sub-pixels under the first luminance based on the first complementary color coefficient and the second complementary color coefficient. 5. The method of claim 4, wherein: the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; When the pixel color of the to be represented by the color coordinates, the first sub-- the sub-claim j replacement ratio corresponding to the pixels R _Wj1, the second sub-claim j replacement ratio corresponding to the pixels R _Wj2, and the _{The jth replacement ratio R Wj3} corresponding to the third sub-pixel is,

to meet,
where j is 1 or 2, the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), and the color coordinates of the initial color of the second sub-pixel are (G _X , G _{Y )} ), the color coordinates of the initial color of the third sub-pixel are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), and the color coordinates of the target color are (W _2X , W _2Y ), and R _Z =1-R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X - Chroma compensation method with W _1Y , W _2Z =1-W _2X -W _2Y. The first color of the first initial color under the first luminance according to claim 4, wherein when the colors of the sub-pixels are represented by color coordinates, based on the first replacement ratio and the second replacement ratio, Determining each of a complementary color coefficient and a second complementary color coefficient of the target color under the first luminance comprises:
obtaining relative positions of color coordinates of the first initial color and the target color in a color coordinate system;
determining, based on the relative positions, a dominant color component that causes the first initial color to deviate from the target color, wherein the dominant color component is a color component that causes the first initial color to deviate from the target color. is the color component with the largest proportion in -;
determining, as the first complementary color coefficient, a first replacement ratio of sub-pixels whose light color is the predominant color component; and
and determining, as the second complementary color coefficient, a second replacement ratio of sub-pixels whose light color is the predominant color component. 7. The method of claim 6, wherein: the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; determining, based on the relative positions, a dominant color component that causes the first initial color to deviate from the target color;
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _2Y , the light of the second sub-pixel determining a color as the predominant color component;
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _2Y , the second determining the light color of 3 sub-pixels as the dominant color component; and
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _2Y , the second and determining the light color of one sub-pixel as the dominant color component. 5. The method of claim 4, wherein the first complementary color coefficient R _W1 , the second complementary color coefficient R _{W2 , and the complementary color gain G i} of the i-th sub-pixel under the first luminance are:

to meet,
where R _W2i is the second replacement ratio corresponding to the i-th sub-pixel, R _W1i is the first replacement ratio corresponding to the i-th sub-pixel, and n is the bit of the driving output signal provided for the sub-pixel number, and the drive output signal is used to drive a sub-pixel to emit light. 4. The initial value of any of the display sub-pixels according to claim 2 or 3 by querying the correspondence relationship between the luminance and the complementary color gain of any of the display sub-pixels. determining a complementary color gain of any of the display sub-pixels under the target luminance based on a color and a target color comprising:
querying the correspondence relationship according to the target luminance;
determining a complementary color gain corresponding to the target luminance as a complementary color gain of any of the display sub-pixels under the target luminance when the target luminance is recorded in the correspondence relationship;
when the target luminance is not recorded in the correspondence relationship, determining a first candidate luminance and a second candidate luminance from among a plurality of luminances recorded in the correspondence relationship, wherein the first candidate luminance is selected from the plurality of luminances. Among the plurality of luminances, the second candidate luminance is a luminance that is weaker than the target luminance and has a minimum luminance difference with respect to the target luminance, and the second candidate luminance is a luminance that is stronger than the target luminance and has a minimum luminance difference with respect to the target luminance. Im-; and
the target luminance according to a linear interpolation method based on the target luminance, the first candidate luminance, the second candidate luminance, a complementary color gain corresponding to the first candidate luminance, and a complementary color gain corresponding to the second candidate luminance and determining a complementary color gain of any of the display sub-pixels under 4. The method of any one of claims 1 to 3, wherein compensating for a color difference of the target pixel unit based on a complementary color gain of each of the display sub-pixels under the target luminance comprises:
determining, based on a complementary color gain of any of the display sub-pixels under the target luminance, a drive output signal provided for any of the display sub-pixels; a drive output signal configured to drive the sub-pixel to emit light; and
and providing the drive output signal to any of the display sub-pixels to compensate for a chrominance difference of the target pixel unit. A chroma compensation device comprising:
a first acquiring module, configured to acquire an initial color of a display sub-pixel in a target pixel unit at a target luminance, and a target color of the target pixel unit under the target luminance, wherein the target pixel unit includes at least two displays of different light colors contains sub-pixels;
a second acquiring module, configured to acquire a complementary color gain of each of the display sub-pixels under the target luminance based on an initial color and a target color of each of the display sub-pixels; and
a compensation module configured to compensate for a chrominance difference of the target pixel unit based on a complementary color gain of each of the display sub-pixels under the target luminance;
The complementary color gain of any of the display sub-pixels under the target luminance is such that when the color of the target pixel unit is compensated from the initial color to the target color under the target luminance, the display sub-pixels A chroma compensation device used to represent the degree to which any display sub-pixel needs to be compensated for. 12. The display sub-pixel according to claim 11, wherein the second acquisition module queries a correspondence relationship between a luminance and a complementary color gain of any of the display sub-pixels to query any of the display sub-pixels. determine a complementary color gain of any of the display sub-pixels under the target luminance based on an initial color of a pixel and a target color, wherein the correspondence is: A chroma compensation device for recording the complementary color gain of any of the display sub-pixels for which a target pixel unit is compensated with the target color. 13. The method of claim 12,
the second acquiring module is further configured to acquire a complementary color gain of each of the display sub-pixels at a plurality of reference luminances based on an initial color and a target color of each of the display sub-pixels;
The apparatus further comprising: an establishment module configured to establish a correspondence relationship between a luminance and a complementary color gain of each of the display sub-pixels under an initial color and a target color of each of the display sub-pixels. The method of claim 13, wherein the second acquisition module,
a first determining sub-module, configured to determine, in a first luminance, a first initial color of the target pixel unit based on an initial color of the at least two display sub-pixels, wherein the first luminance is the target luminance or the plurality of any of the reference luminances of -;
a first acquisition configured to acquire a first replacement ratio of an initial color of each of the display sub-pixels to the first initial color based on the first initial color and an initial color of the at least two display sub-pixels a sub-module, wherein the first replacement ratio is a ratio of an initial color of each of the display sub-pixels to the first initial color;
a second acquiring sub-module, configured to acquire, based on the target color and the initial color of the at least two display sub-pixels, a second replacement ratio of the initial color of each of the display sub-pixels to the target color; the second replacement ratio is a ratio of an initial color of each of the display sub-pixels to the target color;
a first complementary color coefficient of the first initial color under the first luminance and a second complementary color coefficient of the target color under the first luminance, respectively, based on the first substitution ratio and the second substitution ratio; 2 determining sub-module, wherein the first complementary color coefficient is used to express a degree of chrominance compensation that needs to be performed when acquiring the first initial color, and the second complementary color coefficient is to be performed when acquiring the target color. Used to express the degree of color difference compensation needed -; and
and a third determining sub-module configured to determine a complementary color gain of each of the display sub-pixels under the first luminance based on the first complementary color coefficient and the second complementary color coefficient. 15. The method of claim 14, wherein: the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; When the pixel color of the to be represented by the color coordinates, the first sub-- the sub-claim j replacement ratio corresponding to the pixels R _Wj1, the second sub-claim j replacement ratio corresponding to the pixels R _Wj2, and the _{The jth replacement ratio R Wj3} corresponding to the third sub-pixel is,

to meet,
where j is 1 or 2, the color coordinates of the initial color of the first sub-pixel are (B _X , B _Y ), and the color coordinates of the initial color of the second sub-pixel are (G _X , G _{Y )} ), the color coordinates of the initial color of the third sub-pixel are (R _X , R _Y ), the color coordinates of the first initial color are (W _1X , W _1Y ), and the color coordinates of the target color are (W _2X , W _2Y ), and R _Z =1-R _X -R _Y , G _Z =1-G _X -G _Y , B _Z =1-B _X -B _Y , W _1Z =1-W _1X - Chroma compensator with W _1Y , W _2Z =1-W _2X -W _2Y. 15. The method of claim 14, wherein when the colors of the sub-pixels are represented by color coordinates, the second determining sub-module comprises:
to obtain relative positions of the color coordinates of the first initial color and the target color in a color coordinate system;
determine, based on the relative positions, a dominant color component that causes the first initial color to deviate from the target color, wherein the dominant color component is selected from the color component that causes the first initial color to deviate from the target color. is the color component with the largest proportion -;
determine, as the first complementary color coefficient, a first replacement ratio of sub-pixels whose light color is the predominant color component; And
and determine, as the second complementary color coefficient, a second replacement ratio of sub-pixels whose light color is the predominant color component. 17. The method of claim 16, wherein: the at least two display sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel; the second determining sub-module,
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1Y} ≥ W _2Y , the light of the second sub-pixel determine a color as the predominant color component;
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} ≥ W _2X and W _1Y < W _2Y , the second determine the light color of 3 sub-pixels as the dominant color component; And
When the color coordinates of the first initial color (W _1X , W _1Y ) and the color coordinates of the target color (W _2X , W _2Y ) _{satisfy W 1X} < W _2X and W _1Y < W _2Y , the second and determine a light color of one sub-pixel as the predominant color component. A display device comprising:
a chroma compensation device;
The chroma compensation device,
a first acquiring module, configured to acquire an initial color of a display sub-pixel in a target pixel unit at a target luminance, and a target color of the target pixel unit under the target luminance, wherein the target pixel unit includes at least two displays of different light colors contains sub-pixels;
a second acquiring module, configured to acquire a complementary color gain of each of the display sub-pixels under the target luminance based on an initial color and a target color of each of the display sub-pixels; and
a compensation module configured to compensate for a chrominance difference of the target pixel unit based on a complementary color gain of each of the display sub-pixels under the target luminance;
The complementary color gain of any of the display sub-pixels under the target luminance is such that when the color of the target pixel unit is compensated from the initial color to the target color under the target luminance, the display sub-pixels A display device used to represent the degree to which any of the display sub-pixels need to be compensated for. A device for use in chroma compensation, comprising:
processor; and
memory;
The memory stores at least one program configured to be executed by the processor, wherein the program, when executed by the processor, causes the processor to cause the chroma as defined in any one of claims 1 to 3 . A device that allows the compensation method to be performed. As a storage medium in which a computer program is stored,
The computer program, when executed by a processor, causes the processor to perform the chroma compensation method according to any one of claims 1 to 3.

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